67 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/* Copyright (c) 2019 Facebook */3#include <test_progs.h>4#include <linux/bpf.h>5#include "test_pe_preserve_elems.skel.h"6 7static int duration;8 9static void test_one_map(struct bpf_map *map, struct bpf_program *prog,10 bool has_share_pe)11{12 int err, key = 0, pfd = -1, mfd = bpf_map__fd(map);13 DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts);14 struct perf_event_attr attr = {15 .size = sizeof(struct perf_event_attr),16 .type = PERF_TYPE_SOFTWARE,17 .config = PERF_COUNT_SW_CPU_CLOCK,18 };19 20 pfd = syscall(__NR_perf_event_open, &attr, 0 /* pid */,21 -1 /* cpu 0 */, -1 /* group id */, 0 /* flags */);22 if (CHECK(pfd < 0, "perf_event_open", "failed\n"))23 return;24 25 err = bpf_map_update_elem(mfd, &key, &pfd, BPF_ANY);26 close(pfd);27 if (CHECK(err < 0, "bpf_map_update_elem", "failed\n"))28 return;29 30 err = bpf_prog_test_run_opts(bpf_program__fd(prog), &opts);31 if (CHECK(err < 0, "bpf_prog_test_run_opts", "failed\n"))32 return;33 if (CHECK(opts.retval != 0, "bpf_perf_event_read_value",34 "failed with %d\n", opts.retval))35 return;36 37 /* closing mfd, prog still holds a reference on map */38 close(mfd);39 40 err = bpf_prog_test_run_opts(bpf_program__fd(prog), &opts);41 if (CHECK(err < 0, "bpf_prog_test_run_opts", "failed\n"))42 return;43 44 if (has_share_pe) {45 CHECK(opts.retval != 0, "bpf_perf_event_read_value",46 "failed with %d\n", opts.retval);47 } else {48 CHECK(opts.retval != -ENOENT, "bpf_perf_event_read_value",49 "should have failed with %d, but got %d\n", -ENOENT,50 opts.retval);51 }52}53 54void test_pe_preserve_elems(void)55{56 struct test_pe_preserve_elems *skel;57 58 skel = test_pe_preserve_elems__open_and_load();59 if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))60 return;61 62 test_one_map(skel->maps.array_1, skel->progs.read_array_1, false);63 test_one_map(skel->maps.array_2, skel->progs.read_array_2, true);64 65 test_pe_preserve_elems__destroy(skel);66}67